From f057d1403689309c6277961d5c348d4841959a9c Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 17 May 2021 23:07:56 +0200 Subject: mac80211: use sdata->skb_queue for TDLS We need to differentiate these frames since the ones we currently put on the skb_queue_tdls_chsw have already been converted to ethernet format, but now that we've got a single place to enqueue to the sdata->skb_queue this isn't hard. Just differentiate based on protocol and adjust the code to queue the SKBs appropriately. Link: https://lore.kernel.org/r/20210517230754.17034990abef.I5342f2183c0d246b18d36c511eb3b6be298a6572@changeid Signed-off-by: Johannes Berg --- net/mac80211/main.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index f33a3acd7f96..822ff388410e 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -739,8 +739,6 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, INIT_WORK(&local->sched_scan_stopped_work, ieee80211_sched_scan_stopped_work); - INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); - spin_lock_init(&local->ack_status_lock); idr_init(&local->ack_status_frames); @@ -757,7 +755,6 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, skb_queue_head_init(&local->skb_queue); skb_queue_head_init(&local->skb_queue_unreliable); - skb_queue_head_init(&local->skb_queue_tdls_chsw); ieee80211_alloc_led_names(local); @@ -1389,7 +1386,6 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw) cancel_delayed_work_sync(&local->roc_work); cancel_work_sync(&local->restart_work); cancel_work_sync(&local->reconfig_filter); - cancel_work_sync(&local->tdls_chsw_work); flush_work(&local->sched_scan_stopped_work); flush_work(&local->radar_detected_work); @@ -1401,7 +1397,6 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw) wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); skb_queue_purge(&local->skb_queue); skb_queue_purge(&local->skb_queue_unreliable); - skb_queue_purge(&local->skb_queue_tdls_chsw); wiphy_unregister(local->hw.wiphy); destroy_workqueue(local->workqueue); -- cgit From 45daaa1318410794de956fb8e9d06aed2dbb23d0 Mon Sep 17 00:00:00 2001 From: Ilan Peer Date: Fri, 18 Jun 2021 13:41:37 +0300 Subject: mac80211: Properly WARN on HW scan before restart The following race was possible: 1. The device driver requests HW restart. 2. A scan is requested from user space and is propagated to the driver. During this flow HW_SCANNING flag is set. 3. The thread that handles the HW restart is scheduled, and before starting the actual reconfiguration it checks that HW_SCANNING is not set. The flow does so without acquiring any lock, and thus the WARN fires. Fix this by checking that HW_SCANNING is on only after RTNL is acquired, i.e., user space scan request handling is no longer in transit. Signed-off-by: Ilan Peer Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20210618133832.8238ab3e19ab.I2693c581c70251472b4f9089e37e06fb2c18268f@changeid Signed-off-by: Johannes Berg --- net/mac80211/main.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 822ff388410e..cde142fa8cb3 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -257,14 +257,13 @@ static void ieee80211_restart_work(struct work_struct *work) /* wait for scan work complete */ flush_workqueue(local->workqueue); flush_work(&local->sched_scan_stopped_work); + flush_work(&local->radar_detected_work); + + rtnl_lock(); WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), "%s called with hardware scan in progress\n", __func__); - flush_work(&local->radar_detected_work); - /* we might do interface manipulations, so need both */ - rtnl_lock(); - wiphy_lock(local->hw.wiphy); list_for_each_entry(sdata, &local->interfaces, list) { /* * XXX: there may be more work for other vif types and even -- cgit From bac2fd3d753430032043098dd55543037e3f7a60 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 18 Jun 2021 13:41:50 +0300 Subject: mac80211: remove use of ieee80211_get_he_sta_cap() All uses of ieee80211_get_he_sta_cap() were actually wrong, in net/mac80211/mlme.c they were wrong because that code is also used for P2P (which is a different interface type), in net/mac80211/main.c that should check all interface types. Fix all that. Signed-off-by: Johannes Berg Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20210618133832.ede114bc8b46.Ibcd9a5d98430e936344eb6d242ef8a65c2f59b74@changeid Signed-off-by: Johannes Berg --- net/mac80211/main.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index cde142fa8cb3..95a8300da2d0 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -1010,8 +1010,13 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) supp_ht = supp_ht || sband->ht_cap.ht_supported; supp_vht = supp_vht || sband->vht_cap.vht_supported; - if (!supp_he) - supp_he = !!ieee80211_get_he_sta_cap(sband); + for (i = 0; i < sband->n_iftype_data; i++) { + const struct ieee80211_sband_iftype_data *iftd; + + iftd = &sband->iftype_data[i]; + + supp_he = supp_he || (iftd && iftd->he_cap.has_he); + } /* HT, VHT, HE require QoS, thus >= 4 queues */ if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && -- cgit From 2433647bc8d983a543e7d31b41ca2de1c7e2c198 Mon Sep 17 00:00:00 2001 From: Toke Høiland-Jørgensen Date: Wed, 23 Jun 2021 15:47:55 +0200 Subject: mac80211: Switch to a virtual time-based airtime scheduler MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This switches the airtime scheduler in mac80211 to use a virtual time-based scheduler instead of the round-robin scheduler used before. This has a couple of advantages: - No need to sync up the round-robin scheduler in firmware/hardware with the round-robin airtime scheduler. - If several stations are eligible for transmission we can schedule both of them; no need to hard-block the scheduling rotation until the head of the queue has used up its quantum. - The check of whether a station is eligible for transmission becomes simpler (in ieee80211_txq_may_transmit()). The drawback is that scheduling becomes slightly more expensive, as we need to maintain an rbtree of TXQs sorted by virtual time. This means that ieee80211_register_airtime() becomes O(logN) in the number of currently scheduled TXQs because it can change the order of the scheduled stations. We mitigate this overhead by only resorting when a station changes position in the tree, and hopefully N rarely grows too big (it's only TXQs currently backlogged, not all associated stations), so it shouldn't be too big of an issue. To prevent divisions in the fast path, we maintain both station sums and pre-computed reciprocals of the sums. This turns the fast-path operation into a multiplication, with divisions only happening as the number of active stations change (to re-compute the current sum of all active station weights). To prevent this re-computation of the reciprocal from happening too frequently, we use a time-based notion of station activity, instead of updating the weight every time a station gets scheduled or de-scheduled. As queues can oscillate between empty and occupied quite frequently, this can significantly cut down on the number of re-computations. It also has the added benefit of making the station airtime calculation independent on whether the queue happened to have drained at the time an airtime value was accounted. Co-developed-by: Yibo Zhao Signed-off-by: Yibo Zhao Signed-off-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/r/20210623134755.235545-1-toke@redhat.com Signed-off-by: Johannes Berg --- net/mac80211/main.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 95a8300da2d0..05f4c3c72619 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -705,10 +705,13 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, spin_lock_init(&local->queue_stop_reason_lock); for (i = 0; i < IEEE80211_NUM_ACS; i++) { - INIT_LIST_HEAD(&local->active_txqs[i]); - spin_lock_init(&local->active_txq_lock[i]); - local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; - local->aql_txq_limit_high[i] = + struct airtime_sched_info *air_sched = &local->airtime[i]; + + air_sched->active_txqs = RB_ROOT_CACHED; + INIT_LIST_HEAD(&air_sched->active_list); + spin_lock_init(&air_sched->lock); + air_sched->aql_txq_limit_low = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; + air_sched->aql_txq_limit_high = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; } -- cgit